package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    SetmealMapper setmealMapper;

    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Autowired
    DishMapper dishMapper;

    /**
     * 添加套餐
     *
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void insert(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向套餐表插入1条数据
        setmealMapper.insert(setmeal);

        //获取insert返回的ID
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insert(setmealDishes);
    }

    /**
     * 根据ID查询套餐
     *
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByCategoryId(Long id) {
        Setmeal setmeal = setmealMapper.selectBy(id);

        List<SetmealDish> list = setmealDishMapper.getSelectID(id);

        SetmealVO setmealVO = new SetmealVO();

        BeanUtils.copyProperties(setmeal, setmealVO);

        setmealVO.setSetmealDishes(list);
        return setmealVO;
    }

    /**
     * 套餐分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 套餐修改
     *
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.update(setmeal);

        Long setmeaId = setmealDTO.getId();

        setmealDishMapper.delete(setmeaId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });
        setmealDishMapper.insert(setmealDishes);

    }

    /**
     * 套餐起售、停售
     *
     * @param status
     * @param id
     */
    @Transactional
    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && dishList.size() > 0) {
                dishList.forEach(dish -> {
                    if (dish.getStatus() == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.selectBy(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        setmealMapper.delete(ids);
        setmealDishMapper.deleteBySetmealId(ids);
    }
}
